It would seem that Microsoft has silently discontinued activation for Windows XP, as folks via social media are reporting that you can no longer activate via the internet or phone. I decided to install XP on another computer and sure enough, it too failed to activate online and when calling up I was informed that XP was no longer supported, including activation. -- I'm not surprised by this. -- Microsoft dropped support for Windows XP back in 2014 (4 years ago), but you could still activate it regardless. I long ago suspected eventually they would end activation too. Some folks are claiming that depending on where you are or where the call center you get directed toward, you can still activate XP, but it does seem Windows XP's activation is being phased out. I, myself, used a VL key and local script to activate as the normal method for home and pro no longer worked. edit: I believe the above is self-explanatory, but allow me to re-clarify. This is only impacting normal HOME and PRO editions, via the regular methods a normal end-user (consumer) would attempt to activate via online or calling Microsoft using their HOME or PRO edition. Online activation seems to time-out and when calling Microsoft, the automated system no longer has XP as an option, and when speaking to an agent, the moment they ask you what product will you be activating today and you reply, XP, you're told they cannot help you (not even given the chance to provide your key). This has nothing to do with localized activation or pre-activated volume license copies of Windows XP (I, myself, was able to activate using a VL key and a local script).